When you work with a computer, it leaves some useful error messages or window (66) to help you with your work.

A) hints

B) prompts

C) introductions
D) guides

配电箱和开关箱中的N、PE接线端子板必须分别设置，其中N端子板与金属箱体绝缘；PE端子板与金属箱体电气连接。